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Spiral Core 11mm Ignition Wires Engineered for the Demands of LSX Truck and SUV Engines
The 750204 is an 8 piece set of 11mm spiral core spark plug wires engineered for LSX engines in truck, SUV, and van applications, featuring grey wire boots with black plug boots for a clean, functional appearance. Kooks developed the 750204 wire set because installing long tube headers on an LSX truck or SUV often requires routing spark plug wires through new paths that the stock wire set was never designed to accommodate. This wire set wires are built longer and routed differently than OEM, providing the clearance needed to run cleanly from the coils to the plugs without contact against hot header tubes.
The 11mm spiral core construction of this wire set provides excellent radio frequency interference suppression critical for modern vehicles with extensive electronics, while the spiral wound conductor maintains low resistance for consistent spark delivery across all eight cylinders. These wires are built to handle the proximity to hot stainless headers that LSX truck builds require. For any builder installing Kooks long tube headers on a Chevrolet Silverado, GMC Sierra, Suburban, Tahoe, Yukon, Express van, or similar LSX powered truck or utility vehicle, this wire set is the correct wire set to complete the installation properly.
Key Features
- 8 piece complete set for LSX V8 truck, SUV, and van applications
- 11mm diameter spiral core construction for superior RFI suppression
- Grey wire with black plug boots for a clean engine bay appearance
- Designed with routing and length for use with Kooks long tube headers
- Low resistance spiral conductor for consistent spark delivery
- Heat resistant boot construction to handle proximity to hot header tubes
- Replaces the complete spark plug wire set in one kit
What's Included
- 8 x 11mm spiral core spark plug wires, grey with black boots (complete set)
Specifications
| Specification | Detail |
|---|---|
| Part Number (MPN) | 750204 |
| UPC | Contact us for UPC |
| Wire Diameter | 11mm |
| Core Type | Spiral Core |
| Wire Color | Grey |
| Boot Color | Black |
| Quantity | 8 piece set |
| Application | LSX Truck, SUV, and Van engines |
| Use With | Kooks Long Tube Headers |
| Fitment | See Kooks compatibility for specific years and models |
Frequently Asked Questions
Why do I need new spark plug wires when installing long tube headers?
Long tube headers change the routing path between the coils and spark plugs. The OEM wires are not designed to route around the new header tube positions and may contact hot surfaces or lack the length needed for proper clearance. This wire set is designed specifically to solve this problem on LSX truck applications.
What vehicles does this wire set fit?
This wire set is designed for LSX powered trucks, SUVs, and vans. This includes platforms such as the Chevrolet Silverado, GMC Sierra, Tahoe, Suburban, Yukon, and Express van equipped with LSX V8 engines. Confirm fitment with the specific Kooks headers for your vehicle before ordering.
What does 11mm spiral core mean?
The 11mm diameter refers to the overall wire size including insulation. The spiral core refers to the construction method of the internal conductor, where the wire is wound in a spiral pattern rather than straight. This spiral design suppresses radio frequency interference from the ignition system, protecting vehicle electronics and audio systems.
Are these wires compatible with other brands of headers?
This wire set is engineered for use with Kooks headers on LSX truck applications. They may work with other header brands, but routing and length compatibility cannot be guaranteed outside of the Kooks application.
Do these wires include all 8 cylinders?
Yes. This is an 8 piece set that covers all cylinders on the LSX V8 engine.
What is the wire color?
The main wire jacket is grey with black boots at the spark plug end.
Will these wires fit without modification?
This wire set is designed to install without cutting or modification when used with the appropriate Kooks headers for the specific LSX truck application.
Can I use these wires on an LSX car application?
This wire set is specifically engineered for truck, SUV, and van applications. LSX car applications require different wire lengths and routing. See the 750201 sleeve kit or other Kooks wire products for car specific solutions.
Is the spiral core construction durable?
Yes. Spiral core wires have long been used in performance applications for both their RFI suppression and durability. The wound conductor is resilient to the vibration and flexing that occurs in an engine bay environment.
What warranty applies to this wire set?
Contact your Kooks authorized retailer for warranty information applicable to this spark plug wire set.
Installation Instructions
- Confirm that Kooks headers are fully installed and secure before installing the new spark plug wires.
- Remove the old OEM spark plug wires one at a time to avoid mixing up cylinder assignments.
- Identify each wire in the set by length and route to determine which cylinder each wire serves.
- Connect the coil end of each wire to the appropriate ignition coil.
- Route each wire carefully away from hot header tubes, sharp edges, and moving components, using any included wire separators or clips.
- Press the spark plug boot firmly onto the spark plug until it seats with an audible click or positive engagement.
- Repeat for all 8 cylinders, then start the vehicle and verify smooth idle and no misfires.
Prop 65 Warning
WARNING: This product can expose you to chemicals including lead and other chemicals, which are known to the State of California to cause cancer, birth defects or reproductive harm. For more information go to www.P65Warnings.ca.gov.
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